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Simple averaging question

2 messages · lse1986, Ista Zahn

#
Assuming the data frame is named "X":

mean(X[c(5,8), "Time"])

See ?'[' for details.

-Ista
On Thu, Jan 7, 2010 at 1:20 PM, lse1986 <sam_eden1986 at yahoo.co.uk> wrote: